Too many people in the corporate sector are still in denial about climate change, according to Katherine Garret-Cox, CEO of investment firm Alliance Trust.

Watch the summary of the debate in the video below.

At a Guardian Live event in London, Garrett-Cox joined a panel comprising IKEA’s sustainability chief Steve Howard, Green party MP Caroline Lucas, head of responsible investment at Nordea Asset Management Sasja Beslik and leading climate change scientist Kevin Anderson from the Tyndall Centre for Climate Research to discuss what companies can do to help reduce global emissions.